Water Screws ₂
Xah Lee, 2003-05
Propeller for a small boat.
(Source)
The scars on the blade are
Cavitation damage.
MS Europa (Build in 1938).
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Submarine from World War 1.
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Above photos are are taken in the Villa Hügel, Essen, Germany, ~2004, contributed by Volker Peters.
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